利用智能手机外接温度传感器改进中和热的测定实验

Improvement of Neutralization Heat Measurement Experiment by Using Smart Phone External Temperature Sensor

利用智能手机外接温度传感器对中和热测定实验进行改进,利用实时检测功能,在手机界面上直接绘制温度变化数据曲线,可以便捷、直观地反映中和反应过程中温度变化,快速实现中和热的测定。对酸碱浓度、体积等实验条件探究,初步推出实验中NaOH和HCl的最佳浓度和体积。

The experiment of neutralization heat measurement is improved by using smart phone external temperature sensor, and t he data curve of temperature change is drawn directly on the interface of mobile phone with real-time detection function. The temperature change in neutralization reaction can be reflected conveniently and intuitively, and the measurement of neutralization heat can be realized quickly. The optimum concentration and volume of NaOH and HCl in the experiment were preliminarily deduced by exploring the experimental conditions such as acid-base concentration and volume.